# Learning Palantir Foundry
🚀 The first move that turns a dataset into a business object. How you design Object Types largely decides downstream app performance and UX.
📌 Title and Feature URL
Title: オブジェクトタイプ
URL:
📝 Overview
An Object Type defines the schema for a real-world entity or event. A single occurrence is an object instance (e.g., employee "Melissa Chang"), while a group is an object set (e.g., all tenured employees). This mirrors how datasets handle rows and filtered row collections.
🔧 How It Works
- Primary keys and identity: objects need a primary key to uniquely identify instances. Mapping a data source to the object type lets you create and display objects in applications.
- Properties: define an object's characteristics, with options such as edit-only properties, required properties, and shared properties reused across multiple object types.
- Property types: support time series data, geospatial information, and struct types (nested, complex properties).
- Display and search: title/display settings and search indexing improve discoverability inside apps.
- Value Types: custom value types with versions, permissions, and constraints standardize representation across the ontology.
🛠 Practical Usage
- Connect an employee directory or enterprise data to an Employee object type, converting raw datasets into actionable ontology instances.
- Nail down primary key design first and index for search to secure downstream app performance and UX.
- Use struct properties to auto-map hierarchical data, combined with shared properties for reuse.
🎯 Use Cases
- Turn a customer master into a Customer object so the whole company shares one identity.
- Model sensor-equipped assets with time series properties to retain operating history.
- Model sites and stores with geospatial properties for map-based search and aggregation.
⚠️ Caveats
- Primary key design, property types, and search indexing largely determine later app performance and UX, so treat them as your most important modeling decisions.
- You must correctly map a data source to the object type before objects can be created or displayed.
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PalantirFoundry# #
Ontology#